Setup Ruff linter and formatter and pre-commit

[fabien-michel]

This PR setup ruff code linter and formatter.
I choose to apply all ruff rules and ignore some i've picked up to have a balance between expected conventions and current code state.
The configuration is in the pyproject.toml file.

I've updated all files so they are formatted and pass the linter rules.

It also setup pre-commit to have to code auto fixed and formatted on git commit.

This add two dev dependencies : ruff and pre-commit. Should I create a dev-requirements.txt ?

[niccokunzmann]

This would do it, I guess... So I can try that out!

[niccokunzmann]

This add two dev dependencies : ruff and pre-commit. Should I create a dev-requirements.txt ?

I do not know. It does not seem necessary. I will try out the documentation and see if I can set it up. If not, I can open an issue or PR.